Amazing work on the graphics, overall atmosphere and immersion! And the platforming mechanic is quite nice, though it does not feel as juicy as it could be yet as others pointed out.
The intro, main gameplay and final balloon steering all work quite well - of course we're left wanting for more as the actual gameplay experience is a bit short, and the balloon exploration opens a big universe just before closing it on us. But who knows, maybe this will be further developed in a fuller game? :)
I feel the day/night cycle mechanic was not so well conveyed so I was puzzled when I reached the balloon level section and I was told I have to reach it before night, but night feel within 5 sec as I had spent quite some time exploring the first level section.
I liked the nod at Godot with "free and open society" in the audio speech ✊